The visiting professor giving lectures to students invited to meetings at times.A. preferr

问题补充：

The visiting professor giving lectures to students invited to meetings at times.

A. preferred; to being

B. preferred to; rather than

C. preferred; than being

D. preferred; than to being

答案：

(答案→)A. preferred; to being

B. preferred to; rather than

C. preferred; than being

D. preferred; than to being

解析：考查prefer用法。固定词组prefer doing A to doing B宁愿做A不做B；句意：这位访问教授宁愿给学生上课也不愿意时而不时被邀请来参加会议。根据句意第二空使用动名词的被动形式。故A正确。